babylonjs-engine

Create an Engine bound to a canvas element, instantiate a Scene, then add a camera such as ArcRotateCamera and a HemisphericLight. Call engine.runRenderLoop with scene.render and handle window resize events to keep the viewport correct.

Use SceneLoader.ImportMeshAsync with the model path and scene reference to load GLTF or GLB files asynchronously. For batch loading of multiple assets, use AssetsManager with mesh and texture tasks and an onFinish callback.

Babylon.js includes built-in game engine features like physics, GUI, WebXR helpers, and an inspector, while Three.js is a lighter rendering library requiring more third-party plugins. Babylon.js suits full game or immersive app development.

Yes, Babylon.js supports physics through the Havok physics engine via the @babylonjs/havok package. Initialize HavokPhysics, enable physics on the scene with a gravity vector, and attach PhysicsAggregate objects with shapes like sphere, box, or capsule to meshes.

Slow rendering usually comes from too many draw calls, so merge meshes sharing materials or use instances and thin instances for repeated geometry. Also freeze world matrices on static meshes, apply hardware scaling, and use the SceneOptimizer to degrade quality adaptively.

Yes, create the Engine and Scene inside a useEffect hook with a canvas ref, run the render loop, and dispose of the scene and engine in the cleanup function. This pattern integrates Babylon.js rendering into standard React component lifecycles.